LACP EtherChannel: Active/Passive Negotiation

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Build a two-link LACP EtherChannel between SW1 and SW2 using an active/passive pairing. The logical Port-channel2 carries VLAN 20 as an access link so two hosts on opposite switches can communicate. Verify with show etherchannel summary, show lacp neighbor, and host-to-host pings.

Track

CCNA

Est. time

35 minutes

Difficulty

Beginner

Topics

CCNA, EtherChannel, LACP, Switching, Layer2, Port-channel, Link Aggregation

Learning objectives

Bundle two parallel links into a single Port-channel using LACP with active/passive negotiation
Apply consistent Layer-2 parameters on the Port-channel (access VLAN) and allow members to inherit
Validate LACP neighbors and Port-channel state with core IOS show commands
Diagnose common LACP and EtherChannel mismatches that prevent bundling

Troubleshooting focus

Mode mismatch or wrong channel-group number prevents the bundle from forming
Member interfaces configured with conflicting switchport parameters compared to the Port-channel
Forgetting to create or match VLAN 20 on both switches isolates hosts
Leaving per-member access VLAN settings that fight with the Port-channel access config

Topology

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What's included in the package

Work / baseline CML import — lab-work.yaml
Topology diagram — topology.svg
Print-ready topology diagram (PDF) — topology.pdf
Step-by-step learner guide (Markdown — for Obsidian/VS Code) — lab-guide.md
Branded PDF lab guide — open in any viewer (Adobe/Preview) — lab-guide.pdf
Getting-started README — README.md
Verification checklist — verification-checklist.md

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LACP EtherChannel: Active/Passive Negotiation

Learning objectives

Troubleshooting focus

Topology

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